Yangia mangrovi sp. nov., a novel member of the Roseobacter clade isolated from mangrove soil and emended description of Yangia pacifica Dai et al. 2006

During a study of the bacterial diversity of mangrove habitats, a novel Gram-stain-negative, rod-shaped bacterium designated as SAOS 153D T was isolated. Sequence alignment and molecular phylogenetic analyses based on 16S rRNA and core gene sequence of strain SAOS 153D T with closely related taxa revealed a sequence identity of 99.4 % and clustering with Yangia pacifica DX5-10 T . The fatty acids summed feature 8 (C 18:1 ω 7 c /C 18:1 ω 6 c ) and the lipids phosphatidylglycerol, phosphatidylethanolamine and an unknown phospholipid were the major components of the cell wall. The only ubiquinone type present was Q-10. The genomic DNA G+C content of the strain calculated from whole genome sequencing was 66.9 mol%. These chemotaxonomic and genomic characteristics supported the molecular phylogenetic analysis and placed the strain well within the radiation of the genus Yangia . The overall genome related indices using digital DNA–DNA hybridization (35.4 %) and ortho-average nucleotide identity (88.1 %) values were much lower than the recommended thresholds for species delineation, which further consolidated the novel species status of strain SAOS 153D T within the genus Yangia as Yangia mangrovi sp. nov. The type strain is SAOS 153D T (=JCM 31345 T =KCTC 52280 T =MTCC 12749 T ).